Size: (2 years) 4 years (6 years) 8 years (10 years) Chest circumference: (60) 64 (67) 73 (77) Length of the sweater (37) 42 (46) 50 (53) Gauge: 23 stitches x 40 rows in pattern on needle 3.5mm = 10 x 10 cm Or the needle needed to achieve the correct gauge. Recommended needles: Needle 3 mm and 3.5 mm. 40 + 60 cm (80 cm for magic loop) or dou